Disc discrimination apparatus and method

US20110211430A1Inactive Publication Date: 2011-09-01JVC KENWOOD CORP A CORP OF JAPAN
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
JVC KENWOOD CORP A CORP OF JAPAN
Publication Date
2011-09-01
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

Detection is made as to at least one of a ratio between a tracking error and a focus error, and a duty cycle of an off-track signal with respect to an optical disc. A decision is made as to whether or not the optical disc is playable on the basis of the detected at least one of the ratio and the duty cycle. The ratio is a ratio of the focus error to the tracking error or a ratio of the tracking error to the focus error.
Need to check novelty before this filing date? Find Prior Art

Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] This invention relates to a disc discrimination apparatus which may be provided in a recording-disc player such as an on-board CD (Compact Disc) player. In addition, this invention relates to a disc discrimination method.

[0003] 2. Description of the Related Art

[0004] A conventional apparatus for reproducing recorded information from a recording disc such as a CD operates as follows. When a recording disc is inserted into an apparatus body, the conventional apparatus decides whether or not the inserted disc can be played by the apparatus, that is, whether or not recorded information can be reproduced from the inserted disc by the apparatus. In the case where the apparatus decides that the inserted disc can be played, the apparatus starts a process of reproducing recorded information from the disc. Otherwise, the apparatus does not start the process.

[0005] Japanese patent application publication number 2006-228401 discloses ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More